apt - Upgrading Ubuntu from 18.04 to 18.10, but the process was terminated, what now?

I am noob with Ubuntu and i was trying to upgrade my Ubuntu 18.04 to 18.10 with the command sudo apt dist-upgrade and everything was running smoothly, but at some point of the upgrade i saw that my terminal was shutdown by itself... I am trying to do this locally, not by ssh and now i dont know what to do... I cant restart my computer as it says

Incorrect permission on /usr/lib/policykit-1/polkid-agent-helper-1 (needs to be setuid root)

and i have two options Cancel or 'Authenticate` and when i click on authenticate nothing happens...

Also when i try to run sudo apt dist-upgrade again i got this error

E: Unable to acquire the dpkg frontend lock (/var/lib/dpkg/lock-frontend), is another process using it?

What i have to do now?

after a few hours i manage to work it out and was able to fix the broken upgrade. First of all i was not able to reboot the system so i had to do it using the hard reboot (by pressing and holding the power button on my laptop). Then i was not able to boot the system again.

• I had to go to the restore mode (holding Shift when system is booting) and then to go Run terminal as root (or something like that)



• Then I had to connect to the internet and because my internet was not working i had to edit the file /etc/resolv.conf and place the following nameserver 8.8.8.8 8.8.4.4


• Then I ran aptitude (because my apt was going me error i had to run dpkg --configure -a, but this was not helpful, so both apt and dpkg were not working for me), then i press g and then again g (twice) and aptitude start to download and upgrade all the packages that weren't upgrade because the process was stopped when the terminal shut down


• Then i quit aptitude and run apt update and apt upgrade. Upgrade was not working again so i run dpkg --configure -a and this time dpkg worked its magic and then i run apt upgrade and if you see everything executing without any errors you are good to go and u can boot your system in a normal way and everything should work fine.

Hope i can help to all the people that were interrupted after starting the upgrading process of Ubuntu